The all-in-one coaching platform
Run your entire coaching business in one app.
TrainerOS gives personal trainers a command center for programs, nutrition, payments and communication — and gives every client a premium mobile experience for training, tracking and staying in touch.
- AI-powered
- Bilingual EN / EL
- Installable PWA
- Works offline
For trainers
Your command center
Everything you need to program, coach and get paid — without juggling five different apps.
- Create workout & nutrition programs
- Generate them with AI in seconds
- Assign to clients and track adherence
- Manage clients, invites & studios
- Sell packages and take payments
- Message, call & review check-ins
For clients
A premium experience
A coach in your pocket — your plan, your progress and a direct line to your trainer, always with you.
- Follow your plan with video demos
- Log workouts and watch progress climb
- Daily check-ins & wellness tracking
- Your nutrition plan with macros
- Chat and video-call your coach
- Photos, achievements & reminders
Everything inside
One app, the whole coaching workflow
From the first program to the final progress report — every part of training and coaching lives here.
Programming & training
Trainer program creation
Build structured multi-week workout programs, exercise by exercise.
Client program assignment
Assign a program to any client — it appears instantly on their phone.
AI workout generation
Builds a full program from the client's own data, goals, injuries and past performance — with suggested weights. You review, edit and approve before it reaches them.
Exercise library
500+ exercises, each with a demo video and the muscles it targets.
Program templates
Save and reuse your best programs across every client.
3D muscle map
Rotate an interactive 3D body to see exactly what a session trains.
Nutrition
Nutrition plans
Trainer-built meal plans with training- and rest-day variants.
AI nutrition generation
Generates a full meal plan from the client's goals, preferences and macros — safely gated for medical flags. You review and approve before it's assigned.
Food database & macros
960+ foods with calories and macros tracked automatically.
Progress & wellness
Progress tracking
Strength, volume and body metrics charted over time.
Progress photos
Private before/after photos, compared side by side.
Check-ins & wellness
Daily and weekly check-ins for sleep, energy, soreness and more.
Muscle analytics
A heatmap of trained, neglected and recovering muscle groups.
Achievements
Milestones that keep clients motivated and consistent.
Communication
Chat
Real-time messaging with photos, voice notes, reactions and replies.
Voice & video calls
Call your coach or client right inside the app.
Notifications
Push and email alerts for messages, sessions and reminders.
Scheduling
Calendar & sessions
Book and manage sessions on a shared calendar.
Session reminders
Automatic reminders so no session is ever missed.
Business
Payments & packages
Sell training packages and subscriptions with Stripe.
Client management
Onboarding, intake, medical history and notes in one place.
Multi-trainer studios
Run a studio with multiple trainers and shared resources.
Trainer reports
Generate polished PDF progress reports for clients.
All-in-one
Replace five tools with one — programming, nutrition, payments and chat together.
AI-assisted
Draft programs and nutrition plans from real client data in seconds — then review, edit and approve. The AI assists; you stay in control.
Mobile-first PWA
Installs like a native app, works offline — no app store needed.
Bilingual
Fully available in English and Greek.
Ready to run your coaching business in one place?
Create a trainer account in minutes. No native app to install — it works in any browser.
Get started